Find The Common Difference When First Term, Number of Terms and Sum of N Terms is given:
In these type of problems we will use the formula
will find the value of d ( Common Difference) by substituting the value of a (the first term), n(number of terms) and ( Sum of n term) in the equation.
For Example: Find the common difference of an AP whose first term is -3 number of terms is 15 and sum is 60
Solution:
Substituting the value of a, n,
7= 7d
d= 1
If the sum of the first 7 terms of the AP is 210 and its first term is 27 the common difference is _____________ | |||
Right Option : B | |||
View Explanation |
If the sum of the first 5 terms on an AP is 160 and its first term is 6, its common difference is _______________ | |||
Right Option : C | |||
View Explanation |
If the sum of the first five terms of an AP is 450 and its first term is 64, its common difference is ______________ | |||
Right Option : A | |||
View Explanation |
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