Question

Solve it ; A=(1,4,7,10) fast plz ok​

Answer 1

Answer:

Solve the solution 1+4+7+10............. +x = 287

Step-by-step explanation: Solution :- Here, a = 1, and d = 4 - 1 = 2, ...

S(n) = n/2[2a + (n - 1)d] Putting all the values, we get. ⇒ 287 = n/2[2 × 1 + (n - 1) (3)] ⇒ 287 = n/2[2 + (n - 1)3] ...

a + (n - 1)d = x. ⇒ 1 + (14 - 1) (3) = 3. ⇒ 1 + 13 (3) = 3. ...

Hence, the value of x is 40.

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