Solution: To find the multiple of 3 or 5 simply write and run the following code let variables be $sum = 0, $n <?php $sum = 0; for ($n = 0; $n < 1000;...
1 Answers 1 viewsSum of first n terms of A.P will be n2 Explanation : n1=7 Sn=49 we know that Sn = n/2{2a+(n-1)d} thus, Sn1=7/2(2a+6d)=49 =14a+42d=98 ... (1) x17 n2=17 Sn2=289 Sn2=17/2(2a+16d)=289 =34a+272d=578 ....(2) x7 from eq 1 & 2 238a +714d =1666 ...
1 Answers 2 viewsThe multiples of 8 are 8, 16, 24, 32… These are in an A.P., having first term as 8 and common difference as 8. Therefore, a = 8 d = 8 S15 = ? Sn = n/2 [2a + (n - 1)d] S15 = 15/2 [2(8) + (15 -...
1 Answers 1 views(a) kilo (b) deci (c) centi (d) micro (e) nano (f) pico
1 Answers 1 viewsPlease explain it.
1 Answers 1 viewsLet the three consecutive multiples of 8 be x, x+8 and x+16. According to question, x+x+8+x+16=888 [Subtracting 24 from both sides] => 3x=864 => 3x/3=864/3 [Dividing both sides by3] => x = 288 Hence, first multiple of...
1 Answers 1 viewsSolution: Smallest number divisible by 4 after 10 is 12, The greatest number below 250 which is divisible by 4 is 248 Number of terms: {(248-12)/4}+1 {236/4}+1 = 59+1 = 60
1 Answers 1 viewsSolution: a + 3d + a + 7d = 24 Or, 2a + 10d = 24 Similarly, 2a + 14d = 44 So, 44 – 24 = 4d Or, d = 5 2a + 10x5...
1 Answers 2 views