Answer:
a12 = 605
Step-by-step explaination:
a1 = 55, an = 155, n = 3, d = ?
soln.
an = a1 + (n-1) d
155 = 55 + (3-1) d
155 = 55 + 2d
-2d = 55 - 155
-2d/-2 = -100/-2
d = 50
a1 = 55, n = 12, d = 50, a12 = ?
a12 = 55 + (12-1) 50
= 55 + 600 - 50
= 55 + 550
Hope it helps ❤️
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Answers & Comments
Answer:
a12 = 605
Step-by-step explaination:
a1 = 55, an = 155, n = 3, d = ?
soln.
an = a1 + (n-1) d
155 = 55 + (3-1) d
155 = 55 + 2d
-2d = 55 - 155
-2d/-2 = -100/-2
d = 50
a1 = 55, n = 12, d = 50, a12 = ?
soln.
an = a1 + (n-1) d
a12 = 55 + (12-1) 50
= 55 + 600 - 50
= 55 + 550
a12 = 605
Hope it helps ❤️