Question

13 no. solution plzzz. ​

Answer 1

Solution 1st part :-

→ πx + y = 9

Let x = 0

→ π*0 + y = 9

→ y = 9

now, let x = 1

→ π*1 + y = 9

→ (22/7) + y = 9

→ y = 9 - (22/7)

→ y = (63 - 22)/7 = (41/7)

now, let y = 1

→ πx + 1 = 9

→ πx = 8

→ x = = 8 * (7/22)

→ x = (28/11)

now, let x = 2

→ π*1 + y = 9

→ (22/7)*2 + y = 9

→ y = 9 - (44/7)

→ y = (63 - 44)/7 = (19/7)

Hence, four solution are :- (0,9) (1,41/7) (28/11,1) (2,19/7)

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Solution 2nd part :-

→ (4 - 1/3x)³

using (a - b)³ = a³ - b³ - 3a²b + 3ab²

→(4)³ - (1/3x)³ - 3(4)²(1/3x) + 3*4*(1/3x)²

→ 64 - (1/27x³) - (16/x) + (4/3x²) (Ans.)

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