Answer:
Step-by-step explanation:number of terms of AP = Tn = a + (n-1)d where n is 6th term and a is the first term of the progression and d is the common difference.
Therefore, T6 = a + (6-1)d._____(1)
To calculate d, the second term is deducted from the first term;
d = -7 - (-18); -7 + 18 = 11.
T6 = -18 + 5 x 11
= -18 + 55
= 37.
The fifth term is 37- 11, = 26.
The next two terms will be, 26, 37.
Alternative method, add 11, the common difference to 15, which is 26, and add 11 to 26 which gives 37
