Question

Find the sum of first 10 terms of the AP 4 7 10

Answer 1

Answer:

175

Step-by-step explanation:

oh sure easy  

first term is 4

common difference is 3

sn=$\frac{n}{2}$×2a+n-1×d

s10=5×[2×4+{10-1}3

=5×[8+27]

=5×35

∵S10=175

Answer 2

Step-by-step explanation:

Sn= n/2(2a+n-1×d)

S10= 10/2 (2×4+9×3)

bcz from the given A.p 4,7,10

a is 4

d is 7-4= 3

S10= 5(8+27)

S10 = 5×35

S10 is 175